The CCM683 is a true high performance ceiling speaker. The speaker features an 8-inch (200 mm) woven blue aramid fiber cone bass / midrange driver and an aluminum tweeter in a clean, circular die-cast enclosure. The tweeter enclosure rotates off-axis for adjustable treble response, and the die-cast chassis provides additional rigidity that results in cleaner, faster bass. The speaker also features a three-position EQ switch for better off-axis response. The blue aramid fiber cone means the unit is well hidden behind the grille, yet produces remarkably clear and dynamic sound.